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2 Sheets-Sheet 1.

(No Model.)

E. E. POLSTBR.

BRICK KILN.

No. 264,334. Patented Sept. 12, 1882.

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(No Model.) 2 Sheets-Sheet 2.

l UNITED STATES PATENT OFFICE.

ERNST E. POLSTER, OF BALTIMORE, MARYLAND, ASSIGNOR OF ONE-HALF 'IO GEORGE W.V FRANK, OE SAME PLACE.

BRICK-KILN..

SPECIFICATION forming part of Letters Patent No. 264,334, dated September 12, 1882 Application filed Marcil 4, 1882. (No model.)

To all whom it may concern:

Be it known that I, ERNST E. POLSTER, a subject of the Emperor of Germany, 'residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvelnents in Brick-Kilus; and I do herebydeclare the following to be a full, clear, and ex- 'act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to progressive brickkilns, or such as are provided with a series of furnaces which are used successively or progressively in the operation of burning brick.

The invention relates more particularly to the construction of the furnaces and channels orilues connected therewith, whereby alldamp' In the accompanying drawings, Figure l is a vertical longitudinal section of my invention. Fig. 2 is aplan, partly in section, of the same.

Similar letters of reference indicate similar parts in both views.

A is a central brick structure, serving as the foundation for the stack and central portion of the kiln.

B is a chamber with arched roof, situated over the structure A, and which communicates with the brick-stack C. The walls of the chamber B (represented by a) are 'pierced by chaunels b, which lead to furnaces D D D D. These furnaces are also provided with arched roofs, and, unless partitioned offas hereinafter mentioned, form together a continuous passage or chamber. The roofs are provided with fuelapertures c. The outer walls are inclined in ward and represented by c', these walls, together with the walls a, being double, having spaces filled in with earth d or other substance. A va por-channcl,f, is placed at the base of the outer wall, c', which channel communicates, by means of passagesf, with the interior ofthe furnaces.

E represents a steam boiler or-generator, which is suspended within the brick-stack C.

E is a steam-engine, supplied with steam through the pipe c from the generator, and exhausting through the pipe e into the stack.

U' is a sheet-iron extension of the stack, which may reach to any desired height, the sheet stack being made in sections for purposes of removal when the kiln is not in use.

The operation of the kiln is as follows: The green brick are piled within the four furnaces D, D', D, and D in such manner as to permit the free passage of re through or around them. The four furnaces are separated from e'ach other by means of asbestus or other fireproof partitions, (shown in dotted lines by h, h', h, and LH.) Fire is kindled in one ot' the furnaces-say D-which is then supplied with pulverized coal dropped through the apertures c. The damper-s b' being elevated, smoke and the products of combustion pass through the channels b to the inner chamber, B, around the steam-generator E, and up through the sections of the stack C C to the open air. Dampness from the brick passes in the form of Vapor through the channelsf into the vapor-channelf, thence through the vapor-pipes j' to the open air. The asbestus partition h may then be removed and the ame allowed to enter the furnace D', to which pulverized fuel is supplied through the apertures c, as before. When the fire has attained full headway in the furnace D the partition h' may be replaced and the burnt brick withdrawn from the furnace D and green brick substitut ed therefor. The operation then continues, as described, with the furnaces D" and D', the work being continuous-that is to say, the burning of the brick, the removal of burnt brick, and the piling of green brick continuing without interruption. It is to be understood that the dampers closing the connection between the chamber B and the furnaces, as also IOO the dampers closing the openn g between the furnaces and the vapor-channel f, are to be closed as soon as the burning in the furnaces has been discontinued and the corresponding,` dampers of the furnaces to which the fuel is to be admitted lifted. The vapor-channelf carries off all moisture and dampness from the brick, and the Work of dryin g is thereby greatly facilitated.

When it is desired to use the steam-engine Without the kiln the fuel to generate steam in the boiler is inserted through the opening gin the roof of the kiln, the re being held upon a suitable grate within the chamber B.

The interior of the dierent parts of the kiln is reached through suitable man holes provided for the purpose. The roof of the furnaces may, it' desired, be made in removable sections for this purpose.

I am aware of Patent No. 158,085, to F. E. Hoffmann, dated December 22, 1874, and disclaim the construction therein described 5 but,

Having described my invention, I claim- 1. The combination, in a brick-kiln, of a series of furnaces, a stack, and a vapor-channel having outlets tothe open air, with flues effecting communication between the furnaces and stack and furnaces and vapor-channel, respectively, substantially as set forth.

2. The combination, with al series of furnaces, a stack, and a vapor-channel having outlets to the open air, of ues and dampers,

constructed and operating substantially as set forth.

3. The combination, in a brick-kiln, of a series of furnaces, an inner chamber, a stack, dues effecting communication between the furnaces and chamber, and a steam-generator snspeuded Within the stack, substantially as set forth.

4. The combination, in a brick-kiln, of a series of furnaces, a stack, a Vapor-channel, and ues and dampers, constructed and arranged substantially as described, with a steam-generator suspended within the stack, a steam-engine, and connections, Yas set forth.

5. A series ot' furnaces adapted to be separated by partitions and having their roofs pierced with fuel-openings, combined with a stack, a vapor-channel having outlets to the open air, and dues and dampers, constructed and operated substantially as set forth.

6. The combination, in a brick-kiln, of thc stack O and steam-generator E with the fue chamber B, provided with the fuel-opening g, piercing the roof of the kiln and leading under the generator, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ERNST EDUARD POLSTER.

Witnesses:

D. H. ARTHUR, THOMAS LAMPsoN. 

